Intra-Landau-level collective excitations in a bilayer disordered electronic system

TL;DR

This paper studies intra-Landau-level collective excitations in a disordered bilayer 2D electron system under magnetic field, using advanced theoretical methods to identify experimental signatures.

Contribution

It introduces a comprehensive theoretical framework for analyzing intra-Landau-level excitations in disordered bilayer systems, including vertex corrections.

Findings

Identification of signatures in drag measurements

Calculation of energy spectrum with disorder effects

Prediction of collective excitation behaviors

Abstract

We investigate intra-Landau-level collective excitations in a bilayer disordered two-dimensional electron system exposed to a perpendicular magnetic field. The energy spectrum is calculated within the random phase approximation by taking into account electron-impurity scattering in the self-consistent Born approximation which includes consistent vertex corrections. Signatures of these bilayer excitations in drag and collective excitation measurements are identified.